<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>excutor</title>
</head>
<body>
    <script>
        let P = new Promise((resolve,reject)=>{
            //这里是excutor的函数体，这个函数体是同步的，它会立即执行
            console.log(111)
        });
        console.log(222)
    </script>
</body>
</html>